LV7 Tree control Modify Left Cell String

Is it possible to modify the "Left Cell String" of a tree node - I can't find the appropriate method or property to do this.
Cheers,
Wayne

Pleeeeaaaasssseee don't use stacked sequence structures. Use flat sequence structures if you need to. And even then in your code you can eliminate most of them by using property nodes and error wires appropriately..
Look at https://decibel.ni.com/content/docs/DOC-4519. Use Defer Panel updates to speed up the execution when updating multiple tree control properties.
See attached modified VI.
Attachments:
TreeExampleMOD.vi ‏27 KB

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Enjoy SAP Tree control on left of FV60 should be hide by default.

HI ALL,
Enjoy SAP Tree control on left of FV60 should be hide by default. I want to know the procedure to do this.
when we park a document with tree on next time tree comes by default. and when we park a document with tree off next time tree comes off by default.
But i need tree should not come in any case by default.
Thanks.

Hi,
You are already work on SAP. If I am in your position, I would grab the opportunity. You have every opportunity to learn on a live environment. If you work hard and I am sure you would be more confident in the next coming years. It would be a real opportunity for you to learn many thing. I know it is difficult time being a lone person, but, you have ample opportunity.
If you are confident, going for certification is NOT a bad a idea. You can pass the certification and prove the commitment that you have for continuous learning. Your employer would surely recognize your efforts. But, in my opinion, you should work at the same place for next an year or so. Then, you can think of continuing or moving to other employer.
Hope this helps.
Kind Regards,
Ravi

Dragging items in LV7 tree control

If I have a parent item and then a group of child items and I'm dragging them within the parent group to rearrange the order, the cursor flashes back and forth back from an insertion line between two child items, to highlighting the parent item. If the parent item is out of sight because the user has scrolled down the list, the insertion line simply disappears and then should the user 'drop' the item they were dragging, it is placed out of sight at the very top of the list. Is there a way to disable this intermittent highlighting of the parent item?
It seems if you wanted to drag an item to the top of the list and highlight the parent, you would do just that and would never really want to try and perform that function by dragging o
ne item directly onto another (which, when doing a drag/drop, seems like the item would drop above or below the item the mouse was directly on).

I'm on Win2k. To reproduce the problem (the manual way)...
Create a new table
Click in the top left and type new items:
- Parent 1
- Child 1
- Child 2
- Parent 2
- Child 3
- Child 4
Drag child 1 and 2 into parent 1 so they become sub-items
Drag child 3 and 4 into parent 2 so they become sub-items
Table
- Parent 1
- Child 1
- Child 2
- Parent 2
- Child 3
- Child 4
For each child item right click and select 'Child-Only Item'
On the code page create a property node to set the attributes below:
T -> Allow Dragging
F -> Allow Dragging of Parent Items
T -> Allow Dragging Between Items
Run that once and then go back to the front panel and try dragging stuff on the tree--it will exhibit the behavior described earlier, as well as allowing you to rearrange items within a group.
I will also highlight another problem I had for my particular application... perhaps if others have it this will save some time. It took me quite a bit of banging around to find a solution.
Drag Child 3 and Child 4 into Parent 1--Parent 2 is left as an empty group.
Table
- Parent 1
- Child 1
- Child 2
- Child 3
- Child 4
- Parent 2
Now try dragging a child below parent two but not on top of it--ie, Parent 2 is not shaded but a line is visible below it indicating that is where the item will be placed. This creates what would appear to be a parent item (only it isn't).
Table
- Parent 1
- Child 1
- Child 2
- Child 3
- Parent 2
- Child 4
This surprised me, mostly because it took a while to figure out how to disable it. Filtering drop events with a little bit of logic will let you disable this behavior though.
Use the TargetTag inside the event handler with the Navigate Tree methods. If there is no parent and no child of the item you're about to drop on, and you're actually dropping BelowTarget instead of on it, then the item would normally be changed to appear as a parent on the tree.
If [Navigate Tree:Get Parent of TargetTag = Null?] AND [Navigate Tree:Get Child of TargetTag = Null?] AND [BelowTarget = True?], discard the event.
Happy putzing around. I don't think there is a way to disable the weird behavior where it flips back and forth between the parent item and the items you're in between. If you drag across several items it just flickers like crazy but at least it still works and will eventually do what you want it to... just takes some getting used to.

Tree Control Property Node for Accessing "Child Text" String Array

When adding items to a tree control using the EditTreeItems invoke nodes, the inputs include "Child Tag", "Item Indent", "Child Only?", "Glyph Index", "Child Text", and "Left Cell String" as can be seen in this screenshot.
There are property nodes for the tree control for accessing each of these elements, except for the "Child Text", which is an array of strings. It is possible to access this data as outlined in this forum post, but this method is somewhat involved and round about.
I suggest that a property for the Tree class be created to access the Child Text array directly.

The work around only works if you do not have an empty string element some where in the middle.
At lest could the "Active Celltring Property" read return an error when you have gone beyond the end of the array.

Changing size area with help of mouse for custom tree control....

Hi,
I was creating a module pool program where I get tree control on left handise and HTML viewer on right hand side taking the help of example 'SAPSIMPLE_TREE_CONTROL_DEMO' . But I wanted the left hand side custom control adjustable i.e I move the size area by using mouse. (The way it happens in SAP standard screen) How can I do this ?
Please hlep.
Regards,
Jainam,

Solved it myself. I have to use split container for this....

Please, I need help in this,How to make a tree control appear from right to left ??

i working on Arabic project in which we use a tree control and i want it to display its branches from right to left .
i tried to rotate it but it doesn't work because the disclosure triangle still appear on the left .
i ask if there is any thing to mirror the tree control ,and ask if this mirroing will work or not?

You'll need to modify the layout logic of your renderer.
Here's a simple example that extends the default tree renderer and overrides the updateDisplayList method(). It will probably need more work. Set textAlign="right" on your Tree control when you use this renderer. You'll also need to supply a disclosure icon that points in the opposite direction.
package
    import mx.controls.treeClasses.TreeItemRenderer;
    import mx.controls.treeClasses.TreeListData;
    public class RightToLeftTreeItemRenderer extends TreeItemRenderer
        override protected function updateDisplayList(unscaledWidth:Number,
                                                  unscaledHeight:Number):void
            super.updateDisplayList(unscaledWidth, unscaledHeight);
            var startx : Number = data ? TreeListData( listData ).indent : 0;
            startx = unscaledWidth - startx;
            if ( disclosureIcon )
                disclosureIcon.x = startx - disclosureIcon.width;
                startx = disclosureIcon.x;
            if ( icon )
                icon.x = startx - icon.width;
            if ( label )
                label.x = 0;

Numeric cell in Tree control ?

Hi y'all !
I'd like to have numeric input cells in my TREE CONTROL. I can see the types string, ring, combo box, etc. ... but NUMERIC is not included.
I'm using CVI 2012.
Is there an alternative or does anyone know at least why it is not supported ?
Thanks!

Hi carolynturnell,
Indeed cell types included in a tree control are String,Ring, ComboBox, CheckBox, ColorPicker and HorizontalBar.
Tree controls are used to view a hierarchical list of items.
Why do you want to display Numeric/use tree control ?
Valentin
Certified TestStand Architect
Certified LabVIEW Developer
National Instruments France
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Travaux Pratiques d'initiation à LabVIEW et à la mesure
Du 2 au 23 octobre, partout en France

How to update the Left shell string in Tree Parallely

Hi Friends,
I am using Tree Control and subpanel in the same front panel..... For example the subpanel will load the authentication.... in that he user will enter the name ... at the same time while the user types i want to update that value in the Tree control ..... how to do that....parallely.....

parthabe wrote:
Darren wrote:
One of the right-click menu options on the string control is "Update Value While Typing". If you select this option, then you'll get a Value Change event firing every time someone enters a character in the string.
I never knew this before!
I guess that means it would make a good nugget...I'll add it to my list.
-D
Darren Nattinger, CLA
LabVIEW Artisan and Nugget Penman

Renaming the text of a cell in tree control during run time

Hello all,
Actually i am stuck up at one point.In the picture of front panel i attached,there is a tree control and two buttons (re,stop).when i press the rename button,i want the selected cell in the tree control to be focussed and when i enter some text through the key board the cell should be renamed.Can anybody suggest me how to do this?
Thanks and regards,
srikrishnaNF
Solved!
Go to Solution.
Attachments:
Example_VI_FP.png ‏7 KB

Yes it is possible. look at the attached library developed by Norman J. Kirchner, Jr. Also more info could be found @LAVA
Guru
Regards
Guru (CLA)
Attachments:
Tree_Control_VIs.zip ‏437 KB

Tree edit position without top left cell change

I'd like to use a tree control to allow users to input comments on the parents and siblings in the first column. However, when I use the edit position property node, it moves the left most visible column to the edit position column. Anyway around this? I know I can just let the user do the default double click with the pause in between, but its kind of annoying.
VI shows a tree, with the behavior I don't want, and a multicolumn listbox, with the behavior I do want. I don't use the listbox because I want the tree parent/sibling structure
Michael
Message Edited by miguelc on 06-04-2008 01:20 PM
Attachments:
tree.vi ‏21 KB

Hi miguelc,
I must admit, this issue baffled me for quite some time. Thus, it's only fitting that the solution was staring us right in the face Simply contract the length of the second column so that it does not extend past the edge of the Tree control! You'll notice that the Multicolumn Listbox is susceptible to the same behavior if the second column is expanded to the edge. I've attached your VI with these changes to demonstrate.
Peter K.
National Instruments
Attachments:
tree1.vi ‏21 KB

How to works with a tree control in LV7.1

Hi,
I am needing some help with a tree control.
I have a tree control with two colluns, and I would like to double click on a item in the first collun and this iten
must be send to the second collun in the first blank line avaible.
Can you guys help me with that ?
Thanks
Eduardo

Hi
what erectly the problem is ?
Things are same in CE 7.1 also.
Check this [thread|Help on WebDynpro - Tree Structure in a Table;
BR
Satish Kumar
Edited by: satish jhariya on Mar 3, 2009 11:35 AM

How can I save the all the values of a tree control ?

I have a problem, in run time, I adds new items on a tree control, but i don´t know how I can save the values of the child text of each item in a file.
Thanks.

I'm no expert on the tree control, but I made a small example to save all items to a textfile, including item tag, item string, and indent level. One drawback of this method is that it fully expands the tree regardless how the user left it. To go the other direction, you'd have to write a routine to go through the text file and programmatically build the tree.
To master the tree control, I think you have to resort to creating a control reference for it and using the Invoke Node to do some operations. For another approach to traversing and operating on a tree, check out the "Traversing Tree Controls and Setting Custom Symbols" (search the NI Developer Zone site).
Best of luck,
John
Attachments:
Save Tree Structure to Textfile.vi ‏32 KB

How to get access to Row Data (Child Text) in a Tree Control Pragmatically?

In LabVIEW 2010, I have entered Row Data into a Tree Control pragmatically using the Add Item method and providing the Child Text array and the Child Tag for the Row. When a Row in the Tree Control is selected, I can get the Row Tag in the Value Property of the Tree. But how do I access the Child Text array data when the Row is selected? I can't seem to find a Tree Control Property or Method that will return that data back again.
What I am trying to do is: once a Row in a Tree is selected and a button is pushed, if the Row Tag is valid, I want to transfer all of the Row data into another similarly formatted Tree. To do that I need the Row Data for the Tree and Row that was selected. I can not find a way to get access to this Row Data after it has been entered into the Tree.
Can anyone tell me how to pragmatically access the Child Text or Row Data in a Tree Control from a selected Row in the Tree? I have the Tag for the Row, but how do I access the data?
Thanks for your assistance.
Solved!
Go to Solution.

As mentioned in the posting here, you can use the Active Item:Tag property to set the item to which subsequent property changes apply. This includes pulling the Active Celltring values out in a for loop as you increment the Active Cell:Active Column Number to get the row's Child Text data programmatically as I was originally wanting to do.
Note that wiring a 0 to the ActiveColNum property and reading the String value will return the tree item's visible name (in column 0), but not the unique item Tag (which is somewhat intangible after its creation). Therefore, I save the unique item tag when I add the item to the tree control (the output of the Add Item invoke node) and store it as a separate column of the Child Text array and place it out of sight in the tree control so I have access to it later. It might be useful, it might not.
I find the tree control totally non-intuitive and not well explained anywhere, but that's how a lot of LabVIEW coding is I guess. Play with it long enough and you become an expert. I had to learn the hard way, but I hope this helps someone else.
-Richard
"Computers are useless. They can only give you answers." - Pablo Picasso

Save Labview tree Control to file and Load from file

I want to save all of the information from my Labview (8.2) tree control to a file and be able to read it back from a file and re-populate the tree control. I am using different symbols as well as multiple columns and level of children in my control. Does anyone have any suggestions on how to do this?
Thanks
Steve M.
Attachments:
tree pic.jpg ‏60 KB

Hi Steve,
I found a DF that talks about saving the tree to a spreadsheet file and have included it in this message. To get items from the tree control, you have to use open up the tree and remove all of the items off of that tree, while still preserving the heirarchy of the tree. The indent level property node will preserve the heirarchy of the tree and from there you can get the item tag and cell string.
To transfer the file to a tree, you will then need to read the file and insert items into the tree corresponding to the heirarchy. I have also found a tutorial on how to traverse tree controls.
I hope this helps.
Regards,
Nadim
Applications Engineering
National Instruments

Need help regarding tree control

hello guys,
i m working on one Flex slideshow application and i m using Xml loaded tree control with swf loader for this. i want to create next previus button for nevigate this slideshow but i dont know much about action script... please help me
i will provide u code of my script if you need to correct it or suggest me how to make it.
thanks in advance
sagar

here is sourcecode of my file
<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" showCloseButton="true" close="PopUpManager.removePopUp(this);" width="1366" height="768" title="Promotions" fontFamily="Verdana" fontSize="13">
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        <![CDATA[
            import mx.managers.PopUpManager;
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                // Check credentials (not shown) then remove pop up.
                PopUpManager.removePopUp(this);
         import mx.effects.easing.*;
                 //index button script
         private function toggleBtn(e:MouseEvent):void{
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                    panel1.status = "";
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                var children:ICollectionView;
                var suffix:String = "";
                if (tree.dataDescriptor.isBranch(item)) {
                    children = tree.dataDescriptor.getChildren(item);
                    suffix = " (" + item.children().length() + ")";
                return item.@label + suffix;
            private function swfLoader_complete(evt:Event):void {
                panel1.status = (swfLoader.bytesTotal/1024).toFixed(2) + 'KB';
            private function init():void
                    systemManager.stage.displayState=flash.display.StageDisplayState.FULL_SCREEN;
        ]]>
        </mx:Script>
        <mx:XML id="dp" source="data/dp.xml" />
   <mx:Canvas x="30" y="-1" width="1315" height="725">
   <mx:Panel id="panel1"
                width="1310"
                height="712"
                backgroundColor="white"
                borderThickness="0"
                borderThicknessBottom="0"
                borderThicknessLeft="0"
                borderThicknessRight="0"
                borderStyle="none" cornerRadius="0"
                headerHeight="0" left="2" y="3">
            <mx:SWFLoader id="swfLoader"
                    scaleContent="true"
                    complete="swfLoader_complete(event);" />
            <mx:ControlBar>
            </mx:ControlBar>
        </mx:Panel>
   </mx:Canvas>
<mx:Move id="panelOut" target="{panel}" xTo="0" effectEnd="btn.label='Close'"
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</mx:TitleWindow>

LV7 Tree control Modify Left Cell String

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